青藏高原东缘的隆升及其水系的响应
发布时间：2018-11-27 15:04
【摘要】：本文基于ASTER GDEM数据,采用简单数学函数拟合龙门山地区15条河流的河流纵剖面形态,并结合基岩水力侵蚀模型来分析龙门山不同段落的地形形态特征。初步获得以下几点认识:(1)通过对龙门山地区河流纵剖面的分析,龙门山整体上具有较强的隆升速率,导致这一地区强烈的河流侵蚀作用;(2)龙门山中段和南段的河流双对数图以上凸型为主,说明该区域未达到均衡状态,处于前均衡期;(3)龙门山北段的河流双对数图呈直线形态,说明该区域达到均衡状态,处于均衡期;(4)龙门山中段和南段具有更强的构造活动性、更高的隆升速率,控制了该地区地貌、水系演化过程,并且导致这一地区容易发生地质灾害。
[Abstract]:Based on ASTER GDEM data, a simple mathematical function is used to fit the longitudinal profile of 15 rivers in Longmen Mountain area, and the topographic characteristics of different sections of Longmen Mountain are analyzed by combining with the hydraulic erosion model of bedrock. The main results are as follows: (1) through the analysis of the longitudinal section of the rivers in Longmen Mountain area, the Longmen Mountain has a strong uplift rate as a whole, which leads to strong river erosion in this area; (2) the convexity of the double logarithmic map of the rivers in the middle and south sections of Longmen Mountain is dominant, which indicates that the region is not in equilibrium state and is in the pre-equilibrium period; (3) the double logarithmic map of the river in the northern section of Longmen Mountain is in a linear form, which indicates that the region is in equilibrium state and is in equilibrium period; (4) the middle and south sections of Longmen Mountain have stronger tectonic activity and higher uplift rate, which control the evolution of geomorphology and water system in this area, and lead to geological disasters in this area.
【作者单位】： 成都理工大学地球科学学院;成都理工大学油气藏地质及开发工程国家重点实验室;四川省地震局;
【基金】：国家自然科学基金项目“汶川地震驱动的崩塌、滑坡和泥石流的河流响应过程研究”(41172162)、“芦山地震的构造特征与地表响应研究”(41340005)~~
【分类号】：P542;P694
本文编号：2361218
[Abstract]:Based on ASTER GDEM data, a simple mathematical function is used to fit the longitudinal profile of 15 rivers in Longmen Mountain area, and the topographic characteristics of different sections of Longmen Mountain are analyzed by combining with the hydraulic erosion model of bedrock. The main results are as follows: (1) through the analysis of the longitudinal section of the rivers in Longmen Mountain area, the Longmen Mountain has a strong uplift rate as a whole, which leads to strong river erosion in this area; (2) the convexity of the double logarithmic map of the rivers in the middle and south sections of Longmen Mountain is dominant, which indicates that the region is not in equilibrium state and is in the pre-equilibrium period; (3) the double logarithmic map of the river in the northern section of Longmen Mountain is in a linear form, which indicates that the region is in equilibrium state and is in equilibrium period; (4) the middle and south sections of Longmen Mountain have stronger tectonic activity and higher uplift rate, which control the evolution of geomorphology and water system in this area, and lead to geological disasters in this area.
【作者单位】： 成都理工大学地球科学学院;成都理工大学油气藏地质及开发工程国家重点实验室;四川省地震局;
【基金】：国家自然科学基金项目“汶川地震驱动的崩塌、滑坡和泥石流的河流响应过程研究”(41172162)、“芦山地震的构造特征与地表响应研究”(41340005)~~
【分类号】：P542;P694
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